Er:YAG laser irradiation on dentin: FT-Raman and SEM studies

Luís Eduardo Silva Soares; Renata Andrade Bitar; Aldo Brugnera D.D.S.; Fatima A. A. Zanin D.D.S.; Erick B. P. Resende; Walter A. A. Jara; Airton A. Martin

doi:10.1117/12.702244

8 March 2007 Er:YAG laser irradiation on dentin: FT-Raman and SEM studies

Luís Eduardo Silva Soares, Renata Andrade Bitar, Aldo Brugnera D.D.S., Fatima A. A. Zanin D.D.S., Erick B. P. Resende, Walter A. A. Jara, Airton A. Martin

Author Affiliations +

Proceedings Volume 6425, Lasers in Dentistry XIII; 64250R (2007) https://doi.org/10.1117/12.702244
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

This study evaluated the molecular and morphological changes on dentin elements after the Er:YAG laser irradiation. Six human third molars were selected and the occlusal one-third of the crown was removed. The dentin surface was schematically divided into areas corresponding to four surface treatments groups: Control (Group C): 37% phosphoric acid etching; Group I: Er:YAG laser 80mJ; Group II: Er:YAG laser 120mJ; Group III: Er:YAG laser 180mJ. The characterization was performed by Scanning Electron Microscopy (SEM) and Fourier-Transformed Raman Spectroscopy (FT-Raman) before and after the treatments. A reduction of the relative intensity for the spectra was observed in the Group II and III samples. The SEM photomicrographies revealed open dentin tubules in the control group specimens. The groups I, II and III presented partially open dentin tubules. SEM images showed that the laser-irradiated dentin surface was not favorable to the diffusion of monomers. The chemical information obtained by Raman spectroscopy showed that higher laser energies (180 mJ) affected more the phosphate, carbonate and the organic components of dentin.

Citation Download Citation

Luís Eduardo Silva Soares, Renata Andrade Bitar, Aldo Brugnera D.D.S., Fatima A. A. Zanin D.D.S., Erick B. P. Resende, Walter A. A. Jara, and Airton A. Martin "Er:YAG laser irradiation on dentin: FT-Raman and SEM studies", Proc. SPIE 6425, Lasers in Dentistry XIII, 64250R (8 March 2007); https://doi.org/10.1117/12.702244

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available